Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Evaluation of the EUROSEM model for predicting the effects of erosion-control blankets on runoff and interrill soil erosion by water
The European Soil Erosion Model (EUROSEM) is an event-based soil erosion model which predicts runoff and sediment discharge for different environmental conditions. Applying geotextiles or erosion-control blankets (ECB's) on the soil surface significantly affects surface seal formation and topsoil properties and therefore controls runoff and soil erosion rates during a rainfall event. Since within-storm changes of soil surface characteristics and hydrological conditions are not incorporated in EUROSEM, errors in runoff and soil erosion predictions may occur for soil surfaces covered with ECB's. Therefore, the objective of this paper is to evaluate and improve the performance of EUROSEM for simulating the effects of ECB's on runoff and inter-rill soil erosion during intense simulated rainfall events. Results of model simulations are compared with experimental results of inter-rill erosion using biological ECB's and simulated rainfall. Because ECB's applied on the soil surface retard seal formation, the differences between observed and predicted runoff rates and sediment discharges are rather high during the first 20-30 min of the simulated rainstorm. Therefore, a simple approach is proposed to cope with the dynamic evolution of some soil characteristics, i.e. saturated hydraulic conductivity, soil erodibility and soil cohesion, during an intense rainfall event. This time-dependent approach improves the predictions of runoff rate and sediment discharge during the first 20-30 min of a rainfall event and increases the model efficiency. This model approach increases our understanding of the effects of ECB's on within-storm changes in hydrological conditions and soil surface characteristics.
Evaluation of the EUROSEM model for predicting the effects of erosion-control blankets on runoff and interrill soil erosion by water
The European Soil Erosion Model (EUROSEM) is an event-based soil erosion model which predicts runoff and sediment discharge for different environmental conditions. Applying geotextiles or erosion-control blankets (ECB's) on the soil surface significantly affects surface seal formation and topsoil properties and therefore controls runoff and soil erosion rates during a rainfall event. Since within-storm changes of soil surface characteristics and hydrological conditions are not incorporated in EUROSEM, errors in runoff and soil erosion predictions may occur for soil surfaces covered with ECB's. Therefore, the objective of this paper is to evaluate and improve the performance of EUROSEM for simulating the effects of ECB's on runoff and inter-rill soil erosion during intense simulated rainfall events. Results of model simulations are compared with experimental results of inter-rill erosion using biological ECB's and simulated rainfall. Because ECB's applied on the soil surface retard seal formation, the differences between observed and predicted runoff rates and sediment discharges are rather high during the first 20-30 min of the simulated rainstorm. Therefore, a simple approach is proposed to cope with the dynamic evolution of some soil characteristics, i.e. saturated hydraulic conductivity, soil erodibility and soil cohesion, during an intense rainfall event. This time-dependent approach improves the predictions of runoff rate and sediment discharge during the first 20-30 min of a rainfall event and increases the model efficiency. This model approach increases our understanding of the effects of ECB's on within-storm changes in hydrological conditions and soil surface characteristics.
Evaluation of the EUROSEM model for predicting the effects of erosion-control blankets on runoff and interrill soil erosion by water
Bewertung des EUROSEM-Modells zur Vorhersage des Einflusses von Erosionskontrollmatten auf die Wasserableitung und die Bodenerosion in Rinnen bei Starkregen
Smets, T. (Autor:in) / Borselli, L. (Autor:in) / Poesen, J. (Autor:in) / Torri, D. (Autor:in)
Geotextiles and Geomembranes ; 29 ; 285-297
2011
13 Seiten, 11 Bilder, 5 Tabellen, 40 Quellen
Aufsatz (Zeitschrift)
Englisch
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